What's the reason of this exception?
java.lang.IncompatibleClassChangeError
org.apache.axis.message.MessageElement.addTextNode(MessageElement.java:1387)
org.apache.axis.message.SOAPHandler.addTextNode(SOAPHandler.java:148)
org.apache.axis.message.SOAPHandler.endElement(SOAPHandler.java:112)
org.apache.axis.encoding.DeserializationContext.endElement(DeserializationContext.java:1091)
org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source)
org.apache.xerces.impl.XMLNSDocumentScannerImpl.scanEndElement(Unknown
Source)
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatcher.dispatch(Unknown
Source)
org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown
Source)
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source)
org.apache.xerces.parsers.XMLParser.parse(Unknown Source)
org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
javax.xml.parsers.SAXParser.parse(Unknown Source)
org.apache.axis.encoding.DeserializationContext.parse(DeserializationContext.java:228)
org.apache.axis.SOAPPart.getAsSOAPEnvelope(SOAPPart.java:696)
org.apache.axis.Message.getSOAPEnvelope(Message.java:424)
org.apache.axis.handlers.soap.MustUnderstandChecker.invoke(MustUnderstandChecker.java:62)
org.apache.axis.client.AxisClient.invoke(AxisClient.java:206)
org.apache.axis.client.Call.invokeEngine(Call.java:2765)
org.apache.axis.client.Call.invoke(Call.java:2748)
org.apache.axis.client.Call.invoke(Call.java:2424)
org.apache.axis.client.Call.invoke(Call.java:2347)
org.apache.axis.client.Call.invoke(Call.java:1804)